Table 4.

Percentage changes with 95% CIs in hospitalization for CHF associated with a 10 μg/m³ increase in PM_2.5 by season, sex, and age ^a.

Variables	Percentage Change	95% CI	p
Gender
Male	0.31	−0.05–0.67	0.09
Female	0.43	−0.005–0.87	0.0527
Age (year)
<65	0.28	−0.27–0.82	0.318
≥65	0.32	−0.005–0.65	0.0536

^a Lag 0 concentrations were used.